mirror of https://github.com/gchq/CyberChef.git
88 lines
2.5 KiB
JavaScript
88 lines
2.5 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*/
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import Operation from "../Operation";
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import Utils from "../Utils";
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import { DELIM_OPTIONS } from "../lib/Delim";
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import OperationError from "../errors/OperationError";
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import { isWorkerEnvironment } from "../Utils";
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/**
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* To Charcode operation
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*/
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class ToCharcode extends Operation {
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/**
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* ToCharcode constructor
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*/
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constructor() {
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super();
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this.name = "To Charcode";
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this.module = "Default";
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this.description = "Converts text to its unicode character code equivalent.<br><br>e.g. <code>Γειά σου</code> becomes <code>0393 03b5 03b9 03ac 20 03c3 03bf 03c5</code>";
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this.infoURL = "https://wikipedia.org/wiki/Plane_(Unicode)";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [
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{
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"name": "Delimiter",
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"type": "option",
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"value": DELIM_OPTIONS
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},
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{
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"name": "Base",
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"type": "number",
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"value": 16
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}
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];
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}
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/**
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*
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* @throws {OperationError} if base argument out of range
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*/
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run(input, args) {
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const delim = Utils.charRep(args[0] || "Space"),
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base = args[1];
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let output = "",
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padding = 2,
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ordinal;
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if (base < 2 || base > 36) {
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throw new OperationError("Error: Base argument must be between 2 and 36");
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}
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const charcode = Utils.strToCharcode(input);
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for (let i = 0; i < charcode.length; i++) {
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ordinal = charcode[i];
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if (base === 16) {
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if (ordinal < 256) padding = 2;
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else if (ordinal < 65536) padding = 4;
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else if (ordinal < 16777216) padding = 6;
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else if (ordinal < 4294967296) padding = 8;
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else padding = 2;
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if (padding > 2 && isWorkerEnvironment()) self.setOption("attemptHighlight", false);
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output += Utils.hex(ordinal, padding) + delim;
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} else {
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if (isWorkerEnvironment()) self.setOption("attemptHighlight", false);
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output += ordinal.toString(base) + delim;
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}
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}
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return output.slice(0, -delim.length);
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}
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}
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export default ToCharcode;
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